Characterization of a New Calibration Wind-Tunnel within Low Air Velocity Range

摘要

Air velocity is a quantity often used in specifications of industrial processes or buildings. In these applications, the velocity is generally below 1 m.s~(-1), the air temperature can be different from ambient one and the air can flow in any direction whatever. Furthermore, to reach minimum uncertainty measurements, a minimum calibration uncertainty of the used anemometer is needed as well as a calibration as close as possible to measurements conditions. To answer these needs, CETIAT has built a new anemometers' calibration test rig. Its evaluation is presented in terms of stability, homogeneity on humidity, temperature and velocity fields as well as calibration uncertainty.